Hello, I had to remove the fermenting barrel with a nbt editor to make the world playable again, (I actually deleted the whole chunk for it to work again...). Here is my bug report: http://pastebin.com/Lf1MPQ1f

It looks like the null pointer exception is from the fermenting barrel while it says the forestry bottler is involved here.

Awesome mod btw 👍

This might be a bug with Forestry so @mezz might be to blame, but I am not 100% sure. :P

Looks like a Forestry issue, I pushed a fix for it today.
I recommend you add a check on your side too even though it was probably Forestry's fault